The evaporation of lubricating grease mainly depends on what factors?

The evaporation of lubricating grease mainly depends on what factors?‌

The Volatility of Grease Depends Primarily on the Following Factors:‌

‌Type and Properties of Base Oil‌
The molecular weight, fractional composition, and chemical characteristics of the base oil directly influence the evaporation rate. High-viscosity, high-molecular-weight base oils typically exhibit lower evaporation losses.

‌Molecular Weight of Base Oil‌
Higher molecular weight results in slower evaporation rates. For example, synthetic base oils (such as ester oils) have lower volatility than mineral oils.

‌Type and Content of Thickener‌
Changes in the content of soap-based thickeners (such as lithium-based or complex lithium-based) can affect evaporation performance. After base oil evaporation, an increased proportion of soap thickeners may lead to changes in consistency.

‌Temperature Conditions‌
High temperatures significantly accelerate base oil evaporation. Volatility tests (such as SH/T0337-92 or GB/T7325) are typically conducted over a wide temperature range to evaluate the maximum operating temperature.

‌Additive Effects‌
Certain additives may alter the evaporation characteristics of the base oil, but their specific effects require analysis based on the formulation.

The SY0337 Grease Evaporation Tester is designed and manufactured in accordance with the SH/T0337 standard, suitable for measuring the evaporation degree of lubricating grease.

The instrument works by placing an evaporation dish filled with a 1mm thick layer of lubricating grease into a specialized constant-temperature chamber. The grease is maintained at a specified temperature for 1 hour (or the time stipulated by the lubricating grease product standard), and the loss of mass is then measured.

The temperature measurement and control of the instrument are achieved using a digital display PID temperature controller. It features automatic temperature control, high accuracy, and intuitive digital readouts. The heating temperature can be adjusted to any point within the effective range.